Valve-grinding tool.



J. SGHELLER.

VALVE GBINDING TOOL.

APPLICATION FILED JUNI: 29, 1911.

1,023,967. Patented Apr. 23, 1912.

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UNITED STATES PATENT OFFICE.'

JOI-IN SCI-IELLER, 0F MILWAUKEE, WISCONSIN.

VALVE-GRINDING TOOL.

To cZZ whom t may concern Be it known that I, JOHN ScHELLnR, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Valve- Grinding Tools; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention consists in what is herein particularly set forth with reference to the accompanying drawings and pointed out in the claims of this speciiication, .its object being to provide simple, economical, laborsaving and eilicient tools by which to facili-i tate the removal of carbon accumulations between valves and their seats in internalcombustion engines.

Figure 1 of t-he drawings represents a partly sectional elevation of a valve-grinding tool in accordance with my invention, and illustrates an application of said tool. Fig. 2 of said drawings represents a plan view of a fragment of the tool partly in section on line 2-2 in Fig. 1.

Referring by numerals to the drawings 3 indicates a post having a screw-threaded lower end for engagement with a sparkplug socket t of an internal combustion engine, the post being provided with a washer 5 and a set-nut 6 by which to secure it rigid in said socket. Made fast on the upper end of the post is a rest 7 having upwardly projecting parallel flanges 7 longitudinally thereof to form a guide for an adjustable angular yoke 8, the rest-opposing horizontal portion of the yoke being provided with a longitudinal slot. A bolt 9 extends through the rest 7 and the slot 8 of the yoke 8, and a washer 10 and nut 11 on the bolt serves to rigidly secure said yoke in adjusted position on said rest. Hinged at one end to an upwardly extending vertical projection 12 of the yoke is swing plate 13 that normally engages an angular recess in another upwardly extending vvertical projection 14 of said yoke, said plate being notched to engage the sides of said recess. The plate 13 constitutes a shank for a sleeve 15 that projects at right- Specification of Letters Patent.

Application led June 29, 1911.

Patented Apr. 23, 1912.

Serial No. 636,102.

angles thereto in opposite directions and serves as a bearing for a loose stock 16 having the upper end thereof fast in a turningbar 17 central of the same. Attached to the bar 17 is a pair of handles 18, to therewith constitute a double-crank. The shank of a screw-driver bit 19 is made fast in a lower end slot of the stock by a clamp-sleeve 20, and said bit engages the kerf provided in the valve 21 to be ground, the plug of the cylinder-opening over said valve being removed and the aforesaid yoke suitably adjusted.

The tool being applied as herein shown, its stock and the bit therewith are oscillated to grind the valve, the work being readily performed with but little expenditure of labor and no liability of slip on the part of said bit. The yoke of the tool being adjustable, the bit may be readily positioned with respect to varying distances of valve-centers from spark-plug sockets with which the toolpost is engaged, and the swing-plate of said tool permits of the stock and bit being thrown up out of the way whenever desirable.

While I have'shown a double-crank for the bit-stock, a single crank may be substituted where insuflicient clearance makes such substitution necessary.

I claim:

1. A valve-grinding tool comprising a post and means therewith for rigidly securing the same in a spark-plug socket of an internal-combustion engine, a horizontal rest rigid on the post, a support adjustable on the rest longitudinally of the same, means for holding the support in adjusted position, a vertical bearing having a horizontal shank in connection with the support, and a valvegrinding bit having a crank-controlled stock loose in the bearing.

2. A valve-grinding tool comprising a post and means therewith for rigidly securing the same in a spark-plug socket of an internal-combustion engine, a rest rigid on the post, an angular yoke adjustable on the rest, means for holding the yoke in adjusted position, a plate in hinge connection with one vertically extending end of the yoke and engageable with a recess in another similarly extending end of said yoke, a bearing for which the plate constitutes a shank, and a valve-turning bit having a crank-controlled stock loose in the hearing.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee in the county of Milwaukee and State of VVisoonsin in the presence of Witnesses.

JOHN SCHELLER. Witnesses N. E. OLIPHANT, FRANK J. PEAoooK, EMMIT SMITH.

Copies of this patent may be obtained for five `cents .each,by addressing che Commissioner of Patents, WashngtonVD. C. 

